"The D & D Vortex" - When the gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game involving William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith, deception and betrayal are the path to make it to the one open seat, on THE BIG BANG THEORY, Thursday, Feb. 21 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

The twelfth season of The Big Bang Theory will return to UK screens later this month, E4 has revealed. The network aired the first ten episodes of the final season last year.

The show will return on Thursday, February 21 at 20:00 with "The Paintball Scattering". In the episode, Penny and Leonard organize a game of paintball, which turns to chaos when Sheldon is jealous of Amy. Meanwhile, Raj catches his fiancee Anu with an ex-partner, and Stuart doesn't want to move in with Denise.

The Big Bang Theory will be followed at 20:30 by the second season of Young Sheldon, which returned to E4 with new episodes last month.

Star Trek legend William Shatner will guest star in an upcoming episode of The Big Bang Theory's final season, CBS revealed today.

A video on the show's official Facebook page teased guest appearances from William Shatner, True Blood actor Joe Manganiello, director Kevin Smith, basketball great Kareem Abdul-Jabbar and Wil Wheaton in the "ultimate Dungeons and Dragons battle".

Kevin Smith, best known for directing the film series Clerks, previously featured in a Season 8 episode of the show, "The Fortification Implementation", when he called into Wil Wheaton's podcast. Star Trek: The Next Generation star Wil Wheaton has appeared in sixteen episodes of the show since the third season.

William Shatner is not the first Star Trek actor to have featured on the show. Leonard Nimoy gave his voice to a Spock action figure in "The Transporter Malfunction", while George Takei appeared as himself in the Season 4 episode "The Hot Troll Deviation".

No air date was announced for the Dungeons and Dragons-themed episode. The final season of The Big Bang Theory continues Thursday, January 31 on CBS.

The Big Bang Theory is taking a short break this week. A rerun of "The Consummation Deviation" will air tonight (January 24) at 8/7c on CBS, followed by a special rebroadcast of "The Conjugal Configuration" at 9/8c. The final season of The Big Bang Theory will continue next week with "The Meteorite Materialization".

Andy Daly guest stars in the episode. Brian Posehn and Lauren Lapkus reprise their roles as Bert and Denise, respectively.

The Meteorite Manifestation – Sheldon is thrilled to help Bernadette and Wolowitz navigate bureaucratic paperwork, until he discovers they are breaking the law. Also, Leonard is disappointed when his friends exclude him from a scientific project, on THE BIG BANG THEORY, Thursday, Jan. 31 (8:00-8:31 PM, ET/PT) on the CBS Television Network. Andy Daly guest stars as Nathan.

The Big Bang Theory is taking a short break after tonight's new episode. A rerun of "The Consummation Deviation" will air next Thursday, January 24.

As previously reported, Sean Astin (Stranger Things, The Lord of the Rings) and Kal Penn (Designated Survivor, House) guest star in this episode. Joshua Malina also reprises his role as President Siebert.

The Confirmation Polarization – When Sheldon and Amy’s super asymmetry theory is proven by two physicists, Dr. Pemberton (Sean Astin) and Dr. Campbell (Kal Penn) from Chicago, they’re thrilled, until they try to kick Amy off the Nobel nomination. Also, Bernadette has a big success at work and Penny’s going to be a part of it – whether she wants to or not – on THE BIG BANG THEORY, Thursday, Jan. 17 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

The Big Bang Theory will be taking a short break after this episode. A rerun of "The Consummation Deviation" will air Thursday, January 24 before the final season continues on January 31.

Kal Penn (Designated Survivor, House) and Sean Astin (Stranger Things, The Lord of the Rings) will guest star in an upcoming episode of The Big Bang Theory's final season, TVLine.com reported today.

According to TVLine, Penn and Astin will play a duo of physicists who accidentally confirm Sheldon and Amy's theory of super-asymmetry.

Sheldon and Amy first developed their theory of super-asymmetry at their wedding ceremony. After spending the first few months of their marriage working tirelessly on the concept, they were devastated when Leonard showed them a decades-old Russian paper which seemingly disproved their theory. A flash of inspiration from Sheldon's late father helped them look at their thesis in a new light and see an even bigger idea.

The Paintball Scattering – Penny and Leonard organize a paintball game that results in mayhem when Sheldon is jealous of Amy. Also, Koothrappali catches Anu with her ex-boyfriend, and Stuart doesn’t want to move in with Denise, on THE BIG BANG THEORY, Thursday, Jan. 3 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

The show is currently taking a break over the Christmas and New Year holidays. There's a rerun of "The Procreaction Calculation" this Thursday, December 13. A rerun of "The Tam Turbulence" will air December 20 at 8/7c followed by a special rebroadcast of "The Comet Polarization" at 9/8c. Finally, a rerun of "The Planetarium Collision" will air December 27 before the show returns in January.

The Big Bang Theory's Jim Parsons has been nominated in the Best Actor in a Comedy Series category at the 24th Annual Critics' Choice Awards. This is Parsons' fifth nomination for the award, which he won in 2011 and 2014.

The VCR Illumination - Sheldon and Amy are still down about their theory being disproven, but a VHS tape from Sheldon's past inspires him not to give up. Also, Bernadette turns into a pageant mom when she tries to help Wolowitz ace his Magic Castle audition, on THE BIG BANG THEORY, Thursday, Dec. 6 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

This will be the last original episode of 2018 as the show takes a break over the Christmas and New Year holidays. The Big Bang Theory's twelfth and final season will continue in January 2019 as we head towards the series finale.

Two universes are set to collide as Young Sheldon stars Iain Armitage, Lance Barber and Montana Jordan make cameo appearances in an upcoming episode of The Big Bang Theory.

The actors, who play Sheldon, George Sr. and George Jr. on the spin-off show, will briefly appear in a December episode of The Big Bang Theory.

CBS is remaining tight-lipped about how the Young Sheldon characters, whose lives in early '90s East Texas are the subject of the show, will work into a story in the present-day The Big Bang Theory world.

This isn't the first time The Big Bang Theory has gazed into the Young Sheldon universe. Earlier this season, "The Tam Turbulence" revealed why Sheldon and his childhood friend, Tam, drifted apart. Last season, The Big Bang Theory introduced Jerry O'Connell as Sheldon's older brother, Georgie.

Before his role as the Cooper family patriarch on Young Sheldon, Lance Barber appeared in a Season 5 episode of The Big Bang Theory, "The Speckerman Recurrence", as Leonard's childhood bully.

CBS has issued the press release for the next episode of The Big Bang Theory's final season, "The Citation Negation", which airs this Thursday, November 15.

Lauren Lapkus returns as Stuart's girlfriend, Denise, in this episode.

The Citation Negation – Sheldon and Amy are devastated after learning from a Russian paper that Super Asymmetry has already been discovered and disproven. Also, ultra-competitive Bernadette asks Stuart’s girlfriend, Denise, to teach her how to beat Howard in a popular videogame, on THE BIG BANG THEORY, Thursday, Nov. 15 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

The Big Bang Theory will be taking a short break over the Thanksgiving holiday following this episode. A rerun of "The Conjugal Configuration" will air Thursday, November 22 at 8/7c followed by a special rebroadcast of "The Proton Regeneration" at 9/8c. After another rerun on Thursday, November 29, the show will return with a new episode on December 6.

CBS has released the synopsis for the next episode of The Big Bang Theory, "The Consummation Deviation", which airs this Thursday, November 8.

Kathy Bates and Teller return as Amy's parents in the episode, while Rati Gupta reprises her role as Anu.

The Consummation Deviation – Sheldon tries to bond with Amy’s father, but when Wolowitz lures Mr. Fowler (Teller) away with magic tricks, Sheldon has no choice but to bond with Mrs. Fowler (Kathy Bates). Also, Koothrappali and Anu try to get physical for the first time, on THE BIG BANG THEORY, Thursday, Nov. 8 (8:00-8:31 PM, ET/PT) on the CBS Television Network.

The second season of Young Sheldon, the Big Bang Theory prequel focusing on early life of Sheldon Cooper growing up in East Texas, will premiere in the UK next month.

British broadcaster E4 will begin showing the second season on Thursday, November 8 at 20:30. The Big Bang Theory's final season, which currently occupies the 20:30 slot, will move forward to 20:00.

In Young Sheldon's second season premiere, "A High-Pitched Buzz and Training Wheels", Sheldon gets a paper route after his attempt to dismantle the family's refrigerator lands his dad with an unexpected repair bill.